qmp.c

   1 /*
   2  * QEMU Management Protocol
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu-common.h"
  17 #include "sysemu.h"
  18 #include "qmp-commands.h"
  19 #include "ui/qemu-spice.h"
  20 #include "ui/vnc.h"
  21 #include "kvm.h"
  22 #include "arch_init.h"
  23 #include "hw/qdev.h"
  24 #include "blockdev.h"
  25 #include "qemu/qom-qobject.h"
  26
  27 NameInfo *qmp_query_name(Error **errp)
  28 {
  29     NameInfo *info = g_malloc0(sizeof(*info));
  30
  31     if (qemu_name) {
  32         info->has_name = true;
  33         info->name = g_strdup(qemu_name);
  34     }
  35
  36     return info;
  37 }
  38
  39 VersionInfo *qmp_query_version(Error **err)
  40 {
  41     VersionInfo *info = g_malloc0(sizeof(*info));
  42     const char *version = QEMU_VERSION;
  43     char *tmp;
  44
  45     info->qemu.major = strtol(version, &tmp, 10);
  46     tmp++;
  47     info->qemu.minor = strtol(tmp, &tmp, 10);
  48     tmp++;
  49     info->qemu.micro = strtol(tmp, &tmp, 10);
  50     info->package = g_strdup(QEMU_PKGVERSION);
  51
  52     return info;
  53 }
  54
  55 KvmInfo *qmp_query_kvm(Error **errp)
  56 {
  57     KvmInfo *info = g_malloc0(sizeof(*info));
  58
  59     info->enabled = kvm_enabled();
  60     info->present = kvm_available();
  61
  62     return info;
  63 }
  64
  65 UuidInfo *qmp_query_uuid(Error **errp)
  66 {
  67     UuidInfo *info = g_malloc0(sizeof(*info));
  68     char uuid[64];
  69
  70     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  71                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  72                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  73                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  74                    qemu_uuid[14], qemu_uuid[15]);
  75
  76     info->UUID = g_strdup(uuid);
  77     return info;
  78 }
  79
  80 void qmp_quit(Error **err)
  81 {
  82     no_shutdown = 0;
  83     qemu_system_shutdown_request();
  84 }
  85
  86 void qmp_stop(Error **errp)
  87 {
  88     vm_stop(RUN_STATE_PAUSED);
  89 }
  90
  91 void qmp_system_reset(Error **errp)
  92 {
  93     qemu_system_reset_request();
  94 }
  95
  96 void qmp_system_powerdown(Error **erp)
  97 {
  98     qemu_system_powerdown_request();
  99 }
 100
 101 void qmp_cpu(int64_t index, Error **errp)
 102 {
 103     /* Just do nothing */
 104 }
 105
 106 #ifndef CONFIG_VNC
 107 /* If VNC support is enabled, the "true" query-vnc command is
 108    defined in the VNC subsystem */
 109 VncInfo *qmp_query_vnc(Error **errp)
 110 {
 111     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 112     return NULL;
 113 };
 114 #endif
 115
 116 #ifndef CONFIG_SPICE
 117 /* If SPICE support is enabled, the "true" query-spice command is
 118    defined in the SPICE subsystem. Also note that we use a small
 119    trick to maintain query-spice's original behavior, which is not
 120    to be available in the namespace if SPICE is not compiled in */
 121 SpiceInfo *qmp_query_spice(Error **errp)
 122 {
 123     error_set(errp, QERR_COMMAND_NOT_FOUND, "query-spice");
 124     return NULL;
 125 };
 126 #endif
 127
 128 static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
 129 {
 130     bdrv_iostatus_reset(bs);
 131 }
 132
 133 static void encrypted_bdrv_it(void *opaque, BlockDriverState *bs)
 134 {
 135     Error **err = opaque;
 136
 137     if (!error_is_set(err) && bdrv_key_required(bs)) {
 138         error_set(err, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
 139                   bdrv_get_encrypted_filename(bs));
 140     }
 141 }
 142
 143 void qmp_cont(Error **errp)
 144 {
 145     Error *local_err = NULL;
 146
 147     if (runstate_check(RUN_STATE_INMIGRATE)) {
 148         error_set(errp, QERR_MIGRATION_EXPECTED);
 149         return;
 150     } else if (runstate_check(RUN_STATE_INTERNAL_ERROR) ||
 151                runstate_check(RUN_STATE_SHUTDOWN)) {
 152         error_set(errp, QERR_RESET_REQUIRED);
 153         return;
 154     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 155         return;
 156     }
 157
 158     bdrv_iterate(iostatus_bdrv_it, NULL);
 159     bdrv_iterate(encrypted_bdrv_it, &local_err);
 160     if (local_err) {
 161         error_propagate(errp, local_err);
 162         return;
 163     }
 164
 165     vm_start();
 166 }
 167
 168 void qmp_system_wakeup(Error **errp)
 169 {
 170     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 171 }
 172
 173 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 174 {
 175     Object *obj;
 176     bool ambiguous = false;
 177     ObjectPropertyInfoList *props = NULL;
 178     ObjectProperty *prop;
 179
 180     obj = object_resolve_path(path, &ambiguous);
 181     if (obj == NULL) {
 182         error_set(errp, QERR_DEVICE_NOT_FOUND, path);
 183         return NULL;
 184     }
 185
 186     QTAILQ_FOREACH(prop, &obj->properties, node) {
 187         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 188
 189         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 190         entry->next = props;
 191         props = entry;
 192
 193         entry->value->name = g_strdup(prop->name);
 194         entry->value->type = g_strdup(prop->type);
 195     }
 196
 197     return props;
 198 }
 199
 200 /* FIXME: teach qapi about how to pass through Visitors */
 201 int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret)
 202 {
 203     const char *path = qdict_get_str(qdict, "path");
 204     const char *property = qdict_get_str(qdict, "property");
 205     QObject *value = qdict_get(qdict, "value");
 206     Error *local_err = NULL;
 207     Object *obj;
 208
 209     obj = object_resolve_path(path, NULL);
 210     if (!obj) {
 211         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 212         goto out;
 213     }
 214
 215     object_property_set_qobject(obj, value, property, &local_err);
 216
 217 out:
 218     if (local_err) {
 219         qerror_report_err(local_err);
 220         error_free(local_err);
 221         return -1;
 222     }
 223
 224     return 0;
 225 }
 226
 227 int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret)
 228 {
 229     const char *path = qdict_get_str(qdict, "path");
 230     const char *property = qdict_get_str(qdict, "property");
 231     Error *local_err = NULL;
 232     Object *obj;
 233
 234     obj = object_resolve_path(path, NULL);
 235     if (!obj) {
 236         error_set(&local_err, QERR_DEVICE_NOT_FOUND, path);
 237         goto out;
 238     }
 239
 240     *ret = object_property_get_qobject(obj, property, &local_err);
 241
 242 out:
 243     if (local_err) {
 244         qerror_report_err(local_err);
 245         error_free(local_err);
 246         return -1;
 247     }
 248
 249     return 0;
 250 }
 251
 252 void qmp_set_password(const char *protocol, const char *password,
 253                       bool has_connected, const char *connected, Error **errp)
 254 {
 255     int disconnect_if_connected = 0;
 256     int fail_if_connected = 0;
 257     int rc;
 258
 259     if (has_connected) {
 260         if (strcmp(connected, "fail") == 0) {
 261             fail_if_connected = 1;
 262         } else if (strcmp(connected, "disconnect") == 0) {
 263             disconnect_if_connected = 1;
 264         } else if (strcmp(connected, "keep") == 0) {
 265             /* nothing */
 266         } else {
 267             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 268             return;
 269         }
 270     }
 271
 272     if (strcmp(protocol, "spice") == 0) {
 273         if (!using_spice) {
 274             /* correct one? spice isn't a device ,,, */
 275             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 276             return;
 277         }
 278         rc = qemu_spice_set_passwd(password, fail_if_connected,
 279                                    disconnect_if_connected);
 280         if (rc != 0) {
 281             error_set(errp, QERR_SET_PASSWD_FAILED);
 282         }
 283         return;
 284     }
 285
 286     if (strcmp(protocol, "vnc") == 0) {
 287         if (fail_if_connected || disconnect_if_connected) {
 288             /* vnc supports "connected=keep" only */
 289             error_set(errp, QERR_INVALID_PARAMETER, "connected");
 290             return;
 291         }
 292         /* Note that setting an empty password will not disable login through
 293          * this interface. */
 294         rc = vnc_display_password(NULL, password);
 295         if (rc < 0) {
 296             error_set(errp, QERR_SET_PASSWD_FAILED);
 297         }
 298         return;
 299     }
 300
 301     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 302 }
 303
 304 void qmp_expire_password(const char *protocol, const char *whenstr,
 305                          Error **errp)
 306 {
 307     time_t when;
 308     int rc;
 309
 310     if (strcmp(whenstr, "now") == 0) {
 311         when = 0;
 312     } else if (strcmp(whenstr, "never") == 0) {
 313         when = TIME_MAX;
 314     } else if (whenstr[0] == '+') {
 315         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 316     } else {
 317         when = strtoull(whenstr, NULL, 10);
 318     }
 319
 320     if (strcmp(protocol, "spice") == 0) {
 321         if (!using_spice) {
 322             /* correct one? spice isn't a device ,,, */
 323             error_set(errp, QERR_DEVICE_NOT_ACTIVE, "spice");
 324             return;
 325         }
 326         rc = qemu_spice_set_pw_expire(when);
 327         if (rc != 0) {
 328             error_set(errp, QERR_SET_PASSWD_FAILED);
 329         }
 330         return;
 331     }
 332
 333     if (strcmp(protocol, "vnc") == 0) {
 334         rc = vnc_display_pw_expire(NULL, when);
 335         if (rc != 0) {
 336             error_set(errp, QERR_SET_PASSWD_FAILED);
 337         }
 338         return;
 339     }
 340
 341     error_set(errp, QERR_INVALID_PARAMETER, "protocol");
 342 }
 343
 344 #ifdef CONFIG_VNC
 345 void qmp_change_vnc_password(const char *password, Error **errp)
 346 {
 347     if (vnc_display_password(NULL, password) < 0) {
 348         error_set(errp, QERR_SET_PASSWD_FAILED);
 349     }
 350 }
 351
 352 static void qmp_change_vnc_listen(const char *target, Error **err)
 353 {
 354     if (vnc_display_open(NULL, target) < 0) {
 355         error_set(err, QERR_VNC_SERVER_FAILED, target);
 356     }
 357 }
 358
 359 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 360                            Error **errp)
 361 {
 362     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 363         if (!has_arg) {
 364             error_set(errp, QERR_MISSING_PARAMETER, "password");
 365         } else {
 366             qmp_change_vnc_password(arg, errp);
 367         }
 368     } else {
 369         qmp_change_vnc_listen(target, errp);
 370     }
 371 }
 372 #else
 373 void qmp_change_vnc_password(const char *password, Error **errp)
 374 {
 375     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 376 }
 377 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 378                            Error **errp)
 379 {
 380     error_set(errp, QERR_FEATURE_DISABLED, "vnc");
 381 }
 382 #endif /* !CONFIG_VNC */
 383
 384 void qmp_change(const char *device, const char *target,
 385                 bool has_arg, const char *arg, Error **err)
 386 {
 387     if (strcmp(device, "vnc") == 0) {
 388         qmp_change_vnc(target, has_arg, arg, err);
 389     } else {
 390         qmp_change_blockdev(device, target, has_arg, arg, err);
 391     }
 392 }
 393
 394 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 395 {
 396     ObjectTypeInfoList *e, **pret = data;
 397     ObjectTypeInfo *info;
 398
 399     info = g_malloc0(sizeof(*info));
 400     info->name = g_strdup(object_class_get_name(klass));
 401
 402     e = g_malloc0(sizeof(*e));
 403     e->value = info;
 404     e->next = *pret;
 405     *pret = e;
 406 }
 407
 408 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 409                                        const char *implements,
 410                                        bool has_abstract,
 411                                        bool abstract,
 412                                        Error **errp)
 413 {
 414     ObjectTypeInfoList *ret = NULL;
 415
 416     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 417
 418     return ret;
 419 }
 420
 421 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 422                                                    Error **errp)
 423 {
 424     ObjectClass *klass;
 425     Property *prop;
 426     DevicePropertyInfoList *prop_list = NULL;
 427
 428     klass = object_class_by_name(typename);
 429     if (klass == NULL) {
 430         error_set(errp, QERR_DEVICE_NOT_FOUND, typename);
 431         return NULL;
 432     }
 433
 434     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 435     if (klass == NULL) {
 436         error_set(errp, QERR_INVALID_PARAMETER_VALUE,
 437                   "name", TYPE_DEVICE);
 438         return NULL;
 439     }
 440
 441     do {
 442         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 443             DevicePropertyInfoList *entry;
 444             DevicePropertyInfo *info;
 445
 446             /*
 447              * TODO Properties without a parser are just for dirty hacks.
 448              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 449              * for removal.  This conditional should be removed along with
 450              * it.
 451              */
 452             if (!prop->info->set) {
 453                 continue;           /* no way to set it, don't show */
 454             }
 455
 456             info = g_malloc0(sizeof(*info));
 457             info->name = g_strdup(prop->name);
 458             info->type = g_strdup(prop->info->legacy_name ?: prop->info->name);
 459
 460             entry = g_malloc0(sizeof(*entry));
 461             entry->value = info;
 462             entry->next = prop_list;
 463             prop_list = entry;
 464         }
 465         klass = object_class_get_parent(klass);
 466     } while (klass != object_class_by_name(TYPE_DEVICE));
 467
 468     return prop_list;
 469 }